Improvement in pumps



PATRICK 'Bulevarl or CHICAGO, 4ILLINOIS.

Letters 'Patent No. 111,120, dated January 24, 1871.

IMPROVEMENT iN PUMPS.

The Schedule referred to inrthese Letters Patentand making pa'rt 'of the same.

To all (whom 'it may concern y Beit known that I, PATRICK HARVEY, of Chicago, in the county of Cook and State of Illinois, have invented anew and useful Improvement in Pumps and l do hereby declare the following to be a full, clear, and exactdescription thereof, whieh will enable others skilled in the art to which, my invention appertains to make 'and use the same, reference being had to the accompanying drawingforming part of this speciiication, in whichi Figure l is a vertical central section of my invention; and

Figure 2 is a cross-section or plan of the same, taken ou line :t .'v.

Similarletteis of reference indicate corresponding parts in the several figures' of the drawing. y

My invention relates to Athat class `of pumps commonlygoperated by suction; and

The improvement consists iu providing the main cylinder. with .au intermediate or inner cylinder, within .which is secured thesuction-valve,the whole .of whiclrisv so arranged as 'to-bring said valve below the check-valveof the pipe communicating with the well or reservoir from which water is to be drawn, the object of which is vto secure the priming of the valve, 'rendering the same air-tight, by which 'means the pump will at all times perform its necessary function. In the accompanying drawing- A represents the main cylinder, which is made of metal, and has its npperand lower end screw-threaded externally.

B is an annular disk, which is ,screw-threaded on its inner side, by which means the `.same is firmly axed to the lower end of said cylinder.

Upon the inner side of saidv disk, between its upper surface and the lower end of the cylinder, is secured a packing, (l, which may be made of anysuitable maierial that will insure a water-tight joint.

Affixed to theupper end of said cylinder is a similar disk, D, through which the plunger-rod E passes.

Sai'ddisk is also secured water-tight by means of suitable packing, O.

Within said cylinder is secured an intermediate or inner cylinder, F, which is so arranged asto provide an annular chamber, d, between its outer side and the inner-fside of the main cylinder A, which communicates`-with the chamber of the inner cylinder by means of a series of vertical slots, e c, cut through the lower end ofthe same. l

Within said cylinder F is secured the suction-valve G, which is connected to the plunger-rod E, in the usual manner.

'Aiiixed to the main cylinder, near its upper end, is a pipe, H, which communicates with the well or reservoir from which the water is to be drawn.

Secured within said pipe H, `near its upper end, is an ordinary check-valve, J,.so arranged as to be lifted by the action of the water when drawn through the pipe.

It is a fact long established that, in using the ordinary pumpl the valves often fail to perform their proper function. This is occasioned by the water leaking from the same, which prevents the forming of a vacuum in the cylinder by the air passingl through t-he valve, while with my invention this difficulty is entirely overcome, as the maiirvalve is secured within the inner cylinder below the c11eck-valve,tbns preventing any leakage of water from the same, which renders vthe valves self-priming.

- In using my invention, the operation is as follows: Power is applied to the handle of the pump, (not shown,) which imparts a vertical movement to valve G, by 1means of rod E, in the usual manner. Thus the water is raised from the` well or reservoir through pipe H into the annular chamber cl, and is drawn through slots c c intosthe chamber of the inner cylin? der F, and is discharged therefrom through pipe j, afiixed to and within disk D.

Having thus described thenature andobjeet of my invention,

What I claim as new, and desire to secure by Letters Patent, is

The cylinders A and F, provided with the annular WVitnesses 4 N. G, GRIVDLnY, G. H. Fnos'r; 

